Sheet-metal-bending machine



1 (R0 Model.)

' G. ROAGH. SHEET METAL BENDING MAGHINB.

Patented Sept. '19, 1-882.

PATENT O FICE.

CHESTER ROACH, OF MINNEAPOLIS, MINNESOTA.

SH EET-METAL-BENDJNGI MACHINE.

SPECIFICATION forming part of Letters Patent No. 264,567,dated-September 19, 1882,

Application filed July 22, 1882. (No model.) I

To all whom it may concern:

Be it known that I, CHESTER ROACH, of Minneapolis, in the'county ofHennepin and State of Minnesota, hav.e invented .a new and ImprovedSheet-Metal-Be11ding Machine; and I hereby declare the following to be afull, clear, and exact description thereof, reference being bad to theaccompanying drawings, making part of this specification, in which--Figure 1 isva front view of the machine. Fig. 2 is a side elevation.Fig. 3 is a cross-sectional view through the rollers with a sheet ofmetal inserted to be bent. Fig. 4 is a view of the same with the metalsheet bent. Fig. 5 is a top plan view ot' one end of the machine.

The object of my invention isfto provide a machine which willwithfacility and certainty bend or fold sheet-ironor other sheet metals,

and my invention consists in a pair of'rollers, one bearing aholding-lip and the other a projecting tang or rib which are mounted ina frame and so geared that by means of segmental cogs and a crank therollers revolve toward each other, and as the rib approaches theholding-lip the metal sheet is bent back over the lip by a kind ofrubbing-pressure, allot which is hereinafter fully described, andspecifically pointed out in the claims.

In order that those skilled in the art may makeand use my invention, Iwill proceed to describe the manner in which 1 have carried it out.

In the said drawings, AA represent a frame,

' in the upperqend of which are journaled two rollers, B G, with theiraxes in the same plane. The front roller,B,has inserted in itscircumference in a longitudinal central line a projecting rib, b, andinthe back roller, 0, within a recess, 0, is set a removable holding-lip,d, conforming in some degree to the outline of the roller, and beneaththis lip is a space,f, to receive the edge of the sheet-metal plate tobe folded. As the thickness of lip 01 determines the space within thebight of the bent edge of the metal sheet,lips of varying thickness maybe inserted at will to obtain various-sized bights. On the ends of thejournals of rollers B and G are segmental cogs g h, which, by means of ahandle on the back roller, 0, operate both rollers simultaneously, theirrevolution being toward each other. One of the cogs, g, is fitted to thespindle-by means of a collar and set-screw, so it may be adjusted inrelation to the rib on roller 13..

The operation is as follows: The rollers being in the position seen inFig.3,the sheet of metal S is inserted edgewise within the space beneathlip d and resting on rib b. The operator then seizes handle 6, andbringing it toward him the rollers are revolved and rib b and lip "dapproach each other until the end of rib b rests upon the ed geof lip d,carrying the sheet of metal over until the fold 0 is made, as seen inFig. 4. The handle is then pushed back, the rollers retracted, and thefolded sheet withdrawn from lip 61. The handle or crank consists of asquare bar, N, which passes through a square hole in a hub, N, on thejournal of roller O,it being secured to the hub at any desired point ofits length by means of a setscrew, m, whereby the amountof leverage maybe increased or diminished.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a sheet-mctal-folding machine, the longitudinally-ribbed roller B,in combination with the roller 0, provided with the longitudinalholding-lip 01, substantially as and for the purpose described.

2. In a sheet-metal-bending machine, the roller 0, provided with asegmental cog, h, in combination with roller B, carrying rib or tangb,and the adjustable segmental cog g,provided with collar and set-screw,all constructed, arranged, and operated as specified.

UHESTER ROAGH.

. Witnesses: FRED P. FOSTER E. W. RossMAN.

